ZIO-HTTP ZIO-QUILL Example

• A very basic zio-http / zio-quill example
• Demonstrates how to use a Db ZLayer implementing data access using zio-quill with zio-http
• The example doesn't go deep into DB specific details (surrogate ids, constraints etc.)

Libraries used / Dependencies

• zio version "1.0.13"
• zio-quill versin "3.8.0"
• h2 version "1.4.199"
• zio-http version "1.0.0.0-RC19"

Artefacts:

• ZHttpQuillMain
  • Shows how to set up a server and zio-http endpoints
  • Just run via IDE or sbt console
• PersonDb
  • Shows how to set up a ZIO Service layer
  • It can be dependency injected and used like shown in the Main.
• application.conf for H2DB setup
• h2-schema.sql

Describe end points for

• adding dynamic user to H2DB. POST http://localhost:8090/person
• getting user(s) from H2DB. GET http://localhost:8090/user/generateduuid

Build and run

• The sample application is built in the form of assembly and executed with run script

sbt clean assembly
./run_zhttp_quill.sh

• The server can be stopped running kill script

./kill_zhttp_quill.sh

• The output is generated in the app.log

tail app.log

Example curl commands for testing

Inject dynamic UUID data by firing this POST endpoint 2 or more times (injecting new records)

curl  -X POST http://localhost:8090/person
Persons: List(Person(102,f7743392-68d2-4acc-b941-c870c0571134,27))%                                                                       

curl  -X POST http://localhost:8090/person
Persons: List(Person(102,f7743392-68d2-4acc-b941-c870c0571134,27), Person(102,fb594b9a-4e34-4a04-b013-2d9ad1fa47cf,27))

Get specific user by name

curl http://localhost:8090/user/f7743392-68d2-4acc-b941-c870c0571134

Hello: List(Person(102,f7743392-68d2-4acc-b941-c870c0571134,27))

Useful References

• Regarding ZLayers and Dependency Injection

Possible Improvements (Overall TODOs):